project: Preserve stderr on upload

A previous change captured stderr when uploading git projects. This
change ensures stderr is sent to stderr.

Bug: b/297097597
Change-Id: I8314e1017d2a42b7b655fe43ce3c312d397894ca
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/384134
Reviewed-by: Mike Frysinger <vapier@google.com>
Commit-Queue: Jason Chang <jasonnc@google.com>
Tested-by: Jason Chang <jasonnc@google.com>
Reviewed-by: Sam Saccone <samccone@google.com>
diff --git a/project.py b/project.py
index bf4f9ae..34e9046 100644
--- a/project.py
+++ b/project.py
@@ -1182,9 +1182,7 @@
             ref_spec = ref_spec + "%" + ",".join(opts)
         cmd.append(ref_spec)
 
-        GitCommand(
-            self, cmd, bare=True, capture_stderr=True, verify_command=True
-        ).Wait()
+        GitCommand(self, cmd, bare=True, verify_command=True).Wait()
 
         if not dryrun:
             msg = "posted to %s for %s" % (branch.remote.review, dest_branch)